Tech Articles & Write Ups

[jthorn9]

OK, for all of you guys that were wondering what your stock heads flow at and how aftermarket heads stack up against them, well, here's your chance to find out. I've listed most of the common aftermarket head types, and some not so common, if you don't see what you're looking for, feel free to contact me, and I'll see what I can find out.

Ford Iron Heads
87-95 Stock E7TE Valve Size Intake - 1.78, Intake Ports Flow @ 124cc
87-95 Stock E7TE Valve Size Exhaust - 1.45

60s Original GT-40 Valve Size Intake - 1.90
60s Original GT-40 Valve Size Exhaust - 1.60

GT-40 Valve Size Intake - 1.84, Intake Ports Flow @ 155cc
GT-40 Valve Size Exhaust - 1.54
65cc Cumbstion Chambers

GT-40P Valve Size Intake - 1.84, Intake Ports Flow @ 185cc
GT-40P Valve Size Exhaust - 1.46
59cc Cumbustion Chambers/61cc Cumbstion Chambers (depends on model)

AFR Aluminum Heads
Street 165cc Pedestal Mount Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Street 165cc Pedestal Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
61cc Cumbustion Chambers

Street 165cc Pedestal Mount Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Street 165cc Pedestal Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
60cc Cumbustion Chambers

Street 165cc Pedestal Mount Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Street 165cc Pedestal Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
58cc Cumbustion Chambers

Street 165cc Stud Mount Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Street 165cc Stud Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
61cc Cumbustion Chambers

Street 165cc Stud Mount Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Street 165cc Stud Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
58cc Cumbustion Chambers

Street 185cc Stud Mount Valve Size Intake - 2.02, Intake Ports Flow @ 185cc
Street 185cc Stud Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
61cc Cumbustion Chambers

Street 185cc Stud Mount Valve Size Intake - 2.02, Intake Ports Flow @ 185cc
Street 185cc Stud Mount Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 69cc
58cc Cumbustion Chambers

Race Stud Mount Valve Size Intake - 2.08, Intake Ports Flow @ 225cc
Race Stud Mount Valve ize Exhaust - 1.60, Exhaust Ports Flow @ 80cc
58cc Cumbustion Chambers

Brodix Aluminum Heads
BF 200 Valve Size Intake - 2.125, Intake Ports Flow @ 248cc
BF 200 Vlave Size Exhaust -
46cc Cumbustion Chambers

ST 5.0 Valve Size Intake - 1.94, Intake Ports Flow @ 171cc
ST 5.0 Valve Size Exhaust -
60cc Cumbstion Chambers

Dart Aluminum Heads
Pro 1 Intake Flows @ 195cc
62cc Cumbustion Chambers

Eddelbrock Aluminmum Heads
Performer Valve Size Intake Flow @ 1.90, Intake Ports Flow @ 170cc
Performer Valve Size Exhaust Flow @ 1.60
60cc Cumbustion Chambers

Performer Valve Size Intake - 2.02, Intake Ports Flow @ 170cc
Performer Valve Size Exhaust - 1.60
60cc Cumbustion Chambers

Victor Jr. Valve Size Intake - 2.05, Intake Ports Flow @ 210cc
Victor Jr. Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 75cc
60cc Cumbstion Chambers

Victor Valve Size Intake - 2.13, Intake Ports Flow @ 240cc
Victor Valve Size Exhaust - 1.63
47cc Cumbustion Chambers

Ford Racing/SVO Aluminum Heads
SVO J302 Valve Size Intake - 2.02
SVO J302 Valve Size Exhaust - 1.60

GT-40 (1968) Valve Size Intake - 1.88
GT-40 (1968) Valve Size Exhaust - 1.62

SVO GT-40 Y302 Valve Size Intake - 1.94, Intake Ports Flow @ 160cc
SVO GT-40 Y302 Valve Size Exhaust - 1.54, Exhaust Ports Flow @ 53cc
64cc Cumbustion Chambers

SVO GT-40 X303 Valve Size Intake - 1.94, Intake Ports Flow @178cc
SVO GT-40 X303 Valve Size Exhaust - 1.54, Exhaust Ports Flow @ 62cc
64cc Cumbustion Chambers

SVO GT-40 X305 Valve Size Intake - 1.94, Intake Ports Flow @178cc
SVO GT-40 X305 Valve Size Exhaust - 1.54, Exhaust Ports Flow @ 62cc
58cc Cumbustion Chambers

Ford Racing Z Valve Size Intake - 2.02, Intake Ports Flow @ 204cc
Ford Racing Z Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 85cc
63cc Cumbustion Chambers

Ford Racing High Port Valve Size Intake - 2.18
Ford Racing High Port Valve Size Exhaust - 1.625
40cc Cumbustion Chambers up to 70cc Cumbustion Chambers

Ford Racing NHRA Valve Size Intake - 2.45
Ford Racing NHRA Valve Size Exhaust - 1.88
65cc Cumbustion Chambers

Ford Racing High Port NASCAR Valve Size Intake - 2.18, Intake Ports Flow up to 400cfm
Ford Racing High Port NASCAR Valve Size Exhaust - 1.625, Intake Ports Flow up to 267 cfm

Holley Aluminum Heads
Systemax II Valve Size Intake - 1.90, Intake Ports Flow @ 165cc
Systemax II Valve Size Exhaust - 1.60, Exhaust Ports Flow @ 71cc
63cc Cumbustion Chambers

Trick Flow Aluminum Heads
Street Heat Valve Size Intake Flow @ 1.92, Intake Ports Flow @ 192cc
Flow Street Heat Valve Size Exhaust Flow @ 1.60 Exhaust Ports Flow @ 87cc
64cc Cumbustion Chambers

Track Heat Valve Size Intake Flow @ 2.02
Track Heat Valve Size Exhaust Flow @ 1.60
61cc Cumbustion Chambers

Twisted Wedge Valve Size Intake Flow @ 2.02
Twisted Wedge Valve Size Exhaust Flow @ 1.60
61cc Cumbustion Chambers

CNC Twisted Wedge Valve Size Intake Flow @ 2.02, Intake Ports Flow @ 185cc
CNC Twisted Wedge Valve Size Exhaust Flow @ 1.60
65cc Cumbustion Chambers

Twisted Wedge Head R Valve Size Intake Flow @ 2.08, Intake Ports Flow @ 206cc
Twisted Wedge Head R Valve Size Exhaust Flow @ 1.60, Exhaust Ports Flow @ 92cc
61cc Cumbustion Chambers

World Products Aluminum Heads
Windsor Sr. Valve Size Intake - 1.90, Intake Ports Flow @ 200cc
Windsor Sr. Vave Size Exhaust - 1.60
64cc Cumbustion chambers

[jthorn9]

From what I've been told and seen both of these are fairly accurate (driver pending), so if you're curious as to what you'd run, well here's your chance.

TunerCalcs - Estimate Quarter Mile ET from Wheel Horsepower and Vehicle Weight

[jthorn9]

Ford Fuel Injection » Fuel Injector Cleaning

Here is a good formula to find out what size injectors you need
(H*B) / (C*D)= estimated injector size

H=horsepower (Rear wheel)
B=*B.S.F.C. (see below)***
C=number of cylinders
D=duty cycle (constant .80-.85)

B.S.F.C.=
Low to med. performance = .50
Performance engine with head work= .45
High performance with lots of head work= .40-.45
S/C or T/C engines= .55-.60

Here is an example using my car,
(300*.45) / (8*.80) = 21.09

Guessing that my 8cyl. car with heads is 300rwhp, and at 80% duty cycle would need somewhere around or above 21lb injectors. That is at 80% duty cycle, which is the most that you would want to run on injectors (to be safe), so 24lb. should be good for my application.

You can use this equation to find what duty cycle your current injectors are running. For example: using x = duty cycle
(300*.45) / (8 * X) = 24lb injectors
x= 70.3% duty cycle

***B.S.F.C. = brake specific fuel consumption, it is the number of pounds of fuel it takes to make 1 horsepower for 1 hour. B.S.F.C values vary from engine to engine depending on its efficiency. The more efficient the lower the B.S.F.C. value, which translates into needing less fuel to make 1 horsepower. This changes for forced induction applications due to the engine needing fuel to cool the combustion chamber, which helps prevent detonation.

Compliments of Martin of another forum

[jthorn9]

Here is a helpful link with lots of info about how to improve performance with your 5.0.

5.0 L Mustang Performance

[jthorn9]

[jthorn9]

M 81 mph
N 87 mph
P 93 mph
Q 99 mph
R 106 mph
S 112 mph
T 118 mph
U 124 mph
H 130 mph
V 149 mph
W 168 mph
Y 186 mph
Z isnt defined because tires ability to endure high speeds keeps increasing...so z pretty much means yes, it will go that fast